When should I create an object in C + + and when should I create it directly with new?

What is the best time to create an object?

You can use the following conditions for new
1 when the number of applicants is uncertain

2 when large space is required

3. dynamic New, non-dynamic without new,

like when you read a file.

You can define an array of BYTE pbuff[4000*1024]; used to store file data

this way, if the file is very small, it will waste memory space, the file is very large, the file data can not be read all

So when you read a file, you need to open up a piece of memory based on the size of the file

BYTE *pbuff = new Byte[size] makes this piece of memory just right to hold the file data

like this, we need new.

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When should I create an object in C + + and when should I create it directly with new?